I guess need to compile also new kernel.
I applied your patches to kernel source from kernel-source package,
changed .config to include ppp_mppe module and compiled modules.
Have error while install modules into memory.
Unknown symbol crypto_alloc_base
Unknown symbol crypto_has_alg
Unknown symbol crypto_free_tfm
I tried to compile kernel and got error
mm/vmscan.c:1614 error: structure has no member named `pages_lots'
PS
Sorry. I missed *.diff files from patches directory
To be continue